1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36101ecd03a489f37fb91a9efd944d5f6a368b3ef77c91e40d691ceb41c979ea. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7a1eaea3-205b-4593-9755-de5d2ae52b51.json and https://artists.proofprofile.net/proofs/artist/7a1eaea3-205b-4593-9755-de5d2ae52b51.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dc7962161a2ae3aa2df6ab871c995a0a66aad519cd35be18b120ce3b516f8d6. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CA5KR2466873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7893994cd8589fc7a1075decb3dd5e42f5b118b21d548fb6f25594c8a2ca8b47. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLT2H2400444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf3da13f8b66ad32078412210abc45073487dfecf11f39e9f3a2a1c238b6d108. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLT2H2400341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39b2090ee33e12e6902df250d6c46229e664dff78d86432dfb51445f8edf3f41. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/KRF632400583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ed6720a30d3543d3c25f07766fb5a11f0466ff40ffc9c49314a43aaa44956ae. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAHK2376564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53fe4cb47ffb32c0d38450aeaee40f29f6f4139951c58ad40a2a90df6bb64ca9. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SE6SA2394217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b6cb267a826410cb38561b0024346e65acbc3521862f909a601bb5d73319d2a. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXW62300334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa85768703e8db6591ebfaeb04afdeb7eadd74395760609bb075671aa3f3487ae. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXW62300203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4df6cec953e2043f422d2f9a72c4831ea485644784f3fb9a1a986825c098f8db. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLT2H2300080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09f9ea8647b501303f36fac08cb9801822c51304b444df4cad02d54643c98a4f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLT2H2200763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x375d5e1b847d4f32cd501745529e3cc82424ba4aac5eeb93b46d2c06f801ec6d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLT2H2200644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e248561c692f5c1678bebb5617be20aa847a947bf5e38b3e74a9844932e8a9e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLT2H2200059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72b2e5fc409ae1acf951b16e6c0618f914d0005052eac0d9fc5709369a654e17. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLT2H2500110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59e2def96b65c6bdaa11f488280d3acc75054d5d544e2a06ebe6af358ecbf7c5. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CH7812533659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2cc301b639ae01a7ceb9f2ebd64726f8e1bf3dd2a9a306add89dc3e3545692d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLYK92500026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d3570ffe20aa76d7c6bc85bf8df488ba393e83aa0f80e7dc26035fd9118028f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLT2H2401596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37999a7da47faf5bc4c04bc924f5d9e7e898eb04932978df5179b8dc0f797876. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLT2H2401487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2079df13673953aba84f5f051c5bbe80838a85921ae0cef1232dc67509320471. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLYK92400172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c8a3fb0c95cec89af1b6b77bb9c229ab526a383059a331ad6d69926b5a57817. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWDE2465385.
What We Started : RISER Compilation Vol. 1